<p><strong>Job Title:</strong> .NET Developer (REST API & Service Modernization)</p><p><strong>Experience:</strong> 5-7 years (flexible based on seniority)</p><p><strong>Location:</strong> Basildon ,UK</p><p><strong>Employment Type:</strong> Contract - Fully Onsite</p><p><br></p><p><strong>Job Summary</strong></p><p>We are seeking a skilled .NET Developer with strong experience in converting legacy services (e.g., SOAP, WCF, monolithic architectures) into modern RESTful APIs using the .NET ecosystem. The ideal candidate will play a key role in service modernization, API design, and cloud-ready architecture.</p><p><br></p><p><strong>Key Responsibilities</strong></p><ul><li>Analyze existing legacy services (SOAP/WCF/ASMX/monoliths) and design migration strategies to RESTful APIs</li><li>Develop and maintain REST APIs using <strong>.NET Core / .NET 6+ / .NET 8</strong></li><li>Refactor and modernize backend services for scalability, performance, and maintainability</li><li>Implement API best practices (versioning, security, documentation, error handling)</li><li>Design and integrate microservices architecture where applicable</li><li>Work with frontend and integration teams to ensure seamless API consumption</li><li>Optimize APIs for performance, reliability, and security</li><li>Write unit and integration tests to ensure code quality</li><li>Participate in code reviews, design discussions, and architecture decisions</li><li>Document APIs using tools like Swagger / OpenAPI</li></ul><p></p>